Is also known as Flavone X, is structurally defined as 5, 7-dihydroxyflavone. Human tissue experiments with this monoflavone demonstrated the ability to limit aromatase activity. Aromatase is an enzyme that is found in various tissues within the body and is responsible for the conversion of androstenedione and testosterone into estrogen. This conversion is utilized by the body to keep Testosterone: Estrogen ratios in balance. When athletes are in quest of increasing lean body mass, maximizing serum testosterone levels is of paramount concern.